With the death of Simon in Chapter Ten of Lord of the Flies, the soul of the group has been removed. Without his intuitive powers, the recognition of the evil that is within them cannot now be admitted. Symbolic of this myopia in the boys is Piggy's sense of seeing more clearly now if he "removed his glasses and shifted the one lens to the other eye." As the "green light" and the patches of sunshine "played over their befouled bodies," Ralph shivers with the recognition that the boys in their frenzy have murdered Simon. But, when Ralph calls the incident of the previous night "murder," Piggy become agitated, "You stop it!" he yells at Ralph. Piggy cannot admit to himself that the boys have so degenerated that they now murder. Instead, he rationalizes,
"It was dark....There was the lightning and thunder and rain. We was scared!...Anything might have happened. it wasn't --what you said."
But, Ralph persists. "Don't you understand, Piggy? The things we did--" Piggy does not want to understand; rather, he suggests that Simon may have just pretended. But, his voice "trailed off at the sight of Ralph's face." For, he knows. Somehow, Piggy cannot accept what has happened. So he attempts to explain, "I was an accident." Then, he accuses Simon as he says that Simon had no "business crawling around in the dark. "He asked for it." Then he changes, "It was an accident."
What bothers Piggy other than the tragic death of Simon, is his and Ralph's participation in the dance. For this reason, he tells Ralph not to let on that they were at the dance. Piggy has seen within himself and within Ralph what Simon has warned against.
Ralph and Piggy argue at the beach about what happened the previous evening. Piggy first argues that they were all just playing and pretending, and Simon was probably pretending too. Ralph vehemently insists that Simon is dead and that they murdered him. Piggy dislikes the use of the word "murder" and continues to rationalize that it was nothing more than an accident.
Piggy says that they were scared, they thought it was the beast, and they lashed out because of it.